Thenmap - The Historical Map Data API

The problem with all these beautiful vintage maps styles that everyone has been creating lately is that while the maps look old school the actual map data is brand spanking new. That's why I created this 1865 Vintage Map of the USA showing the actual state borders from 1865. Now that's real old school. Actually ignore my 1865 map. What I really want to talk about is a great new repository for